T20 in the inclusive breakup of 4.5 GeV polarized 6Li

The analyzing power T20 in the inclusive 1H(6Li,d or α or t)X reaction with 4.5 GeV tensor polarized 6Li nuclei has been measured at an angle of 0.8 degree. The kinematics chosen favor the detection of spectator fragments; in the impulse approximation the laboratory momentum of such a fragment is then the Lorentz boosted internal momentum. Nonzero T20 values have been observed, in agreement with the known nonsphericity of 6Li indicated by its quadrupole moment. The sign of T20 in the d channel suggests that near q=0 the D state in 6Li has the same sign as in the deuteron; an abrupt change of sign near q=0.12 GeV/c is in agreement with theoretical expectation of a node in the αd position wave function. The α-channel data show larger T20 values than the d channel; in this case the small-q-region has not been explored enough to establish a similar node. A few data points in the t channel might suggest that T20 becomes positive above q=0.4 GeV/c in this case